Improvement in coal-sifters



N. PETERS, PHOTULITHOGRAFHER. WASHINGTON, D C.

To` all whom;` it; may concern:

" 1 Beit knownthatl, GEORGE PRATT, of `West Roxbury, in the county of Norfolk and State of Massachusetts, haveinvented anew and that the following isafull, clear, and exact defseription of the same, "reference beingv had to the accompanying drawings, forming-a part of this specification, injwhich j Figure 1 represents a vertical central section of my invention, taken .on the plane'indicated `bythe line x w, liig.4 Fig. 2 is alplan or `top `vievvof the same, [the cover having been ,l removed.` l i i N ,y Similar letters of reference in both views j indicate, corresponding parts. Y i j j This invention `consists of adisklor ring, made ofV cast-iron` or other suitable material, andprovidedwitha iiange projecting on the underside to Vit over, aibarrel, and with another angefonihe top side, and fitted with a j socket` on one side to' receive a swivel that l projects from" the under side of a plate se` cured to the sieve, *the oppositeside `ofthe `disk `being madetofallowa cast-iron handle secured, to the sieveftomove horizontally, saidhandle being made of such a width that whenA it restson thering itiwill keep in itsproper horizontalposition the sieve to which it is fastened, thedust 'being prevented. from escaping by stops` risingin suitable places from the ring, andthe open space, wherein the handle travels, `being closed bya circular slide of the `same diameter. as the inside of the `flange, which slide is fitted to and moves with the handle ini-"a suitable channel on the rings.`

skilledin `the art tomake and use my `nven`tiou, I will `proceed to delToenable those i "scribe its construction and operation with ref `erence to theidrawings.` i

` Arepresents a ring'w is provided with a iiange, A, on its under side, to fit ou a surfaceof saidrin extends from the side h with a socket,1d,' tohreceive a pivotfe,

` i extending i j Speciiicationforming part of Letters Patent No. 35,624,

Improved Coal-Sifter; and'I do hereby declare f .i hieh is madefof castiron or any othensuitable material', and'iw'hich bination with barrel,"B. Frein the upper g a iiange, b, projects, which supports the cover 0, and anV arm, c, which of said ring, is provided` h that projects from the `underside cfa plate, f. i. rIihisplateis providedwith` a bracket, g, and

j it is secured to the sieve D by means of rivets through thebracket g and through and from `topto bottom of thesaine, or and secures the two rims of the sieve PATENT l t o DGEORGEPRATT, OFvVEsr noxBURY, MAsvsAoHusnrTS.

f lMeRovEMENT |N` ooAL-slFTERs.

dated Jun@ 17, isos'.

l The opposite side of the sieve is suspended from a handle, E, which issecured to its side `by means of rivets, and a plate, j, similar to plate' i, which serves to fasten the swivel-plate Said handle slides horizontally on the surface of the ring A, and it is made Wide enough so that it retains the sieve in a horizontal position. An open space, 7c, in the top ange, b, permits the handle, with the sieve, to oscillate in either direction, and said open space is closed by a circular slide, Z, which is ofthe same diameter with the flange b, and which .is provided with a recess, m, to receive the handle.` Stops n, projecting from4 thesurfaee of the ring A, prevent the dust escaping round the edge of the flange. The ring H is made oval ou the inside; so asfto give sufficient motion to the sieve. h

The sieve, the swivelplate, the slide, and the handle are all level with the top edge of lthe Iiange b, and they-are kept in place by the coverG, the rim o open spaces to allow the necessary horizontal motion ofthe handle and swivel-plate.

This sifter gives a more thoroughly shaking than any sifter thatturns on the center;

When the cover is taken off, the whole of thef sieve is open for lling and emptying, the clinkers can be picked out and dropped into the barrel before the sitter is removed, and when the sieve is worn out the working parts can be fastened in a few minutes to any common sieve and at a triiiingcost. The whole is then as good as new. My sifter is therefore more convenient, cheaper, and more durable than any other sifter now in use.

Having thus what I claim as new, and Letters Patent, isj i 1.- The arrangement of the swivel-plate f, projecting from the side ofi-he sieve D, in comdesire to secure by .constructed -and operating as and for the purpose specified. V

2. The arrangement of the ring A with flanges ab and open space 7g, in combination with the,V handle E, circular slide l, stops n, sieve D, cover C, and barrel B, all constructed and operating as and for the purpose herein shown and described.

GEORGE PRATT.y

Witnesses:

BENJ. W. NEWHALL,

` `nearly so, i i

to each other andwith bracket g.

Cess. E. Recetas.

f which is furnished with l motion, and it sifts faster, easier, and better A fully described niy invent-ion,

the' disk or ring A and varm c, 

